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move lessons out of web site

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will move select lessons back to "educators" section
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Tom Ball
2016-06-14 11:49:58 -04:00
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docs/lessons/spinner/activity.md
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# spinner activity
Create an arrow that randomly points to a player.
### ~avatar avatar
### ~
Welcome! This guided tutorial will teach how to program a script that randomly points to a player. Let's get started!
Let's begin by adding an `on shake` condition to know when the micro:bit is shaken.
```blocks
input.onGesture(Gesture.Shake, () => {
})
```
Now let's randomly generate a number from 0 to 3 so that we can randomly display an arrow in a given direction.
```blocks
input.onGesture(Gesture.Shake, () => {
let randomArrow = Math.random(4)
if (randomArrow == 3) {
basic.showLeds(`
. . # . .
. # # # .
# # # # #
. . # . .
. . # . .
`)
}
})
```
Now let's handle each of the cases by displaying the appropriate arrow. (Let's display an up arrow if `random arrow` is 0.
```blocks
input.onGesture(Gesture.Shake, () => {
let randomArrow = Math.random(4)
if (randomArrow == 3) {
basic.showLeds(`
. . # . .
. # # # .
# # # # #
. . # . .
. . # . .
`)
}
if (randomArrow == 2) {
basic.showLeds(`
. . # . .
. . # . .
# # # # #
. # # # .
. . # . .
`)
}
})
```
Now let's handle the rest of the cases for `random arrow`.
```blocks
input.onGesture(Gesture.Shake, () => {
let randomArrow = Math.random(4)
if (randomArrow == 3) {
basic.showLeds(`
. . # . .
. # # # .
# # # # #
. . # . .
. . # . .
`)
}
if (randomArrow == 2) {
basic.showLeds(`
. . # . .
. . # . .
# # # # #
. # # # .
. . # . .
`)
}
if (randomArrow == 1) {
basic.showLeds(`
. . # . .
. # # . .
# # # # #
. # # . .
. . # . .
`)
}
})
```
### ~avatar avatar
Excellent, you're ready to continue with the [challenges](/lessons/spinner/challenges)!
### ~